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Guide tool for guiding downhole tools through wellbore restrictions

a technology of guide tools and wellbore restrictions, which is applied in the direction of directional drilling, borehole/well accessories, construction, etc., can solve the problems of ledges and washouts, difficulty in pushing tool strings, and operator's inability to visually or otherwise determine if the lower end of the rod is moving or no

Inactive Publication Date: 2009-06-11
ZIEBEL U S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be difficult to push tool strings, examples of which include well completion strings, workover strings, and logging tool systems to the full depth of the wellbore due to restrictions in the wellbore.
Ledges and washouts may also be created as a result of collapse of the formation in which the wellbore is drilled, where the flow of fluids from within the wellbore is insufficient to move debris from the collapsed formation to the Earth's surface.
Another challenge related to such spoolable rods is that the well equipment operator cannot visually or otherwise determine if the lower end of the rod is moving or not.
Failure to determine such movement while the surface end of the rod is being inserted into the wellbore can cause the equipment operator to continue pushing the rod into the wellbore against a stopped lower end of the rod, causing damage to or failure of the rod.

Method used

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  • Guide tool for guiding downhole tools through wellbore restrictions
  • Guide tool for guiding downhole tools through wellbore restrictions
  • Guide tool for guiding downhole tools through wellbore restrictions

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Embodiment Construction

[0018]The invention will now be described in detail with reference to a few examples, as illustrated in the accompanying drawings. In describing the examples, numerous specific details may be set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without some or all of these specific details. In other instances, well-known features and / or processes may not be described in detail so as not to unnecessarily obscure the invention and because they would be within the ambit of one of skill in the art. In addition, like or identical reference numerals may be used to identify common or similar elements.

[0019]FIG. 1 shows a wellbore 100 drilled through subsurface formations 102, 104. Subsurface formation 104 may be a hydrocarbon producing formation. The wellbore 100 typically starts with a vertical portion 106, which can extend anywhere from hundreds to thousands of meters, and gra...

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PUM

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Abstract

A guide tool for mounting onto a downhole tool for use in a wellbore penetrating subsurface formations is provided. The guide tool has a bull nose. The bull nose has a first section with an end for sealing against and engaging a lower end of the downhole tool and a second section axially deflectably coupled to the first section.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Priority is claimed from U.S. Provisional Application No. 61 / 012,479, filed on Dec. 10, 2007.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not ApplicableBACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The invention relates generally to well interventions. More specifically, the invention relates to apparatus and method for guiding a downhole tool through a wellbore having wellbore restrictions.[0005]2. Background Art[0006]In the extraction of oil and gas from underground reservoirs, it is frequently necessary to insert a downhole tool or an assembly of such tools, e.g., a tool “string”, into a wellbore drilled through the reservoir. It can be difficult to push tool strings, examples of which include well completion strings, workover strings, and logging tool systems to the full depth of the wellbore due to restrictions in the wellbore. Examples of such restrictions include ledges and washouts created...

Claims

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Application Information

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IPC IPC(8): E21B23/00E21B23/14
CPCE21B23/14
Inventor HANSEN, HENNINGEGGE, GEIR OWEWILBERG, TERJE
Owner ZIEBEL U S